Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3772129 A
Publication typeGrant
Publication dateNov 13, 1973
Filing dateFeb 8, 1971
Priority dateFeb 9, 1970
Also published asCA940820A1, DE2106063A1
Publication numberUS 3772129 A, US 3772129A, US-A-3772129, US3772129 A, US3772129A
InventorsD Dover
Original AssigneeDover Shutters Ltd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Laths for roller shutters
US 3772129 A
Abstract
A lath for a roller shutter, in which a longitudinal extruded aluminium base member is provided against one major face of which is located a layer of foamed plastic insulating material. The other side of the base member is preferably coated with an insulating layer consisting of a microcellular elastomeric material.
Images(2)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent [19] Dover 5] Nov. 13, 1973 LATHS FOR ROLLER SHUTTERS [75] Inventor: Donald Henry William Dover, Little Baddow, near Chelmsford, England [73] Assignee: Dover Roller Shutters Limited,

Witham, Essex, England [22] Filed: Feb. 8, 1971 [21] App]. No: 113,565

[] Foreign Application Priority Data Feb. 9, 1970 Great Britain 6,171/

[52] US. Cl 161/43, 52/309, 160/236,

[51] int. Cl B32b l/04, B32b 3/10, B32b 15/08 [58] Field of Search 161/43, 44, 41, 53, 161/54, 99, 100, 108,109, -114, 119,

[56] References Cited UNITED STATES PATENTS 3,332,170 7/l967 Bangs 52/309 3,234,996 2/1966 King 160/236 X 3,345,245 10/1967 l-lanusa 161/119 3,525,661 8/1970 Jackson 161/43 X 3,327,447 6/1967 Nissley 52/309 3,511,007 5/1970 Babcock 161/160 3,338,013 8/1967 Graham et al. 52/309 3,511,301 5/1970 Graham et a1.... 160/232 X 2,907,383 10/1959 Kloote et a1. 160/232 X 3,236,007 2/1966 Abeson .1 161/190 X 3,591,532 7/1971 Abercrombie et a1... 161/190 X 3,459,611 8/1969 Joseph et al. 264/45 3,557,264 12/1965 Getz et al 264/45 UX Primary Examiner-George F. Lesmes Assistant ExaminerLorraine T. Kendell Att0rneyWender0th, Lind & Ponack [57] ABSTRACT A lath for a roller shutter, in which a longitudinal extruded aluminium base member is provided against one major face of which is located a layer of foamed plastic insulating material. The other side of the base member is preferably coated with an insulating layer consisting of a microcellular elastomeric material.

2 Claims, 5 Drawing Figures Patented Nov .13, 1973 2 Sheets-Sheet 1 o 7 fi/V/ ///////////M/ ///L 2 r///fl////////// DONALD HENRY WILLIAM DOVER,

Inventor Patented Nov .13, 1973 3,772,129

2 Sheets-Sheet 2 DONALD HENRY WILLIAM DOVER,

Inventor Attorneys LATI-IS FOR ROLLER SHUTTERS The invention relates to roller shutters particularly for use in providing a closure for an opening in a refrigerated vehicle, container or the like.

Roller shutters having metallic box section laths are described in co-pending Pat. application Ser. No. 1 10,065 of the present applicant. Such shutters provide a considerable improvement over earlier shutters in terms of rigidity, strength, ease of action and long life, but give rise to difficulties when used as closures for refrigerated stores or vehicles due to the heat flow through the laths.

It is among the objects of the present invention to provide improved arrangements whereby such heat flow may be checked.

The invention therefore provides a lath for a roller shutter, comprising a longitudinal metallic base member presenting two major faces, one of said faces having located thereagainst a layer of foamed plastic insulating material.

The base member is preferably extruded from aluminium. In one form, the layer of foamed plastic material is adhered to said base member and envelops anchorage members projecting therefrom. In another form, the base member comprises portions defining a box section, with said layer of foamed plastic material being disposed within the box section. The other major face is preferably coated with a thermal insulating layer consisting of a microcellular elastomeric material having a K value as defined below of not more than 0.45.

The K value is the thermal conductivity in BThU/ft /hr/F rise in temperature.

The upper and lower walls of each lath preferably present a non linear profile in a direction extending between the major faces.

The invention also comprises a roller shutter when constituted by laths according to the invention.

The invention is further illustrated in the accompanying drawings in which;

FIG. 1 is a sectional end elevation of a first lath according to the invention,

FIG. 2 is a sectional end elevation of a lath similar to that of FIG. 1 but having a slightly modified lower end,

FIG. 3 is a sectional end elevation of the lower and upper ends respectively of the laths of FIGS. 1 and 2 showing the manner whereby they are hinged together when incorporated in a roller shutter,

FIG. 4 is a sectional end elevation of a second lath according to the invention and,

FIG. 5 is a sectional end elevation of a lath similar to that of FIG. 4 but having a slightly modified lower end.

Referring first to FIG. 1 of the drawings, the lath shown comprises a flat longitudinal metallic base member in the form of an aluminium extrusion I having two major faces and three longitudinal ribs 2 on one face thereof, each rib having a head portion 3 embedded in a moulded mass of high density polyurethane foam 4. The foam mass 4 has a density of between and 30 (preferably to pounds per cubic foot and a K value of not more than 0.4.

The extrusion 1 has upper and lower end flanges 5 and 6, the flange 6 having therein a dove tail recess 7 in which a sealing strip 13 is located.

The foamed mass 4 is shaped by the mould in which it is formed has a flat external surface 8 and stepped upper and lower side portions 9 and 10 respectively which terminate at the flanges 5 and 6.

The other face of the aluminium extrusion 1 is surfaced by a layer 11 of semi-flexible closed microcelluler polyurethane elastomer which is sprayed thereon and has a K value of not more than 0.45.

The lath shown in FIG. 2 is generally identical to that of FIG. 1 except in regard to the construction of the lower flange 6a. The lath shown in FIG. 2 is intended as the lowermost lath in a shutter and comprises a recess 12 in the lower wall which receives a horizontally extending sealing strip 15 for engagement in the bottom of the opening in which the shutter is to be mounted.

As best seen in FIG. 3, the laths of the shutter are connected together by hinges 14 bolted to the extrusion 1. The hinges are preferably bolted to the laths prior to the spraying of the layer 11 which is subsequently cut along the hinge lines to permit relative articulated movement of the laths when the shutter is installed.

Referring now to FIG. 4 of the drawings, the lath there shown has a box section and comprises a front wall 20 with upper and lower walls 21 and 22 and an intermediate rib 23 connected to a rear wall 24 by counter sunk bolts 25. The walls 21 and 22 each have an inclined face extending from the front to the rear of the lath and terminating at the front and rear in a short horizontal. The wall 22 includes a dove tail section recess 26 in which a sealing strip 27 of neoprene is located for weather proofing purposes.

Internally, the cavities defined by the box section are filled with a mass of low density polyurethane foam 28. The foam mass 28 has a density of between 1.5 and 4 (preferably 2 to 3) pounds per cubic foot. The outer surface of the wall 24 and the flanges to which it is secured are covered by a layer 29 of the semi-flexible closed microcellular polyurethane elastomer which is sprayed thereon in a similar manner to the layer 11.

The lath shown in FIG. 5 is generally similar to that of FIG. 4 except in regard to the construction of the lower wall 22a. As with the lath of FIG. 2, the lath shown in FIG. 5 is intended as the lowermost lath in a shutter and comprises a recess 30 which receives a horizontally extending sealing strip 31 for an engagement with the bottom of the opening in which the shutter is to be mounted.

I claim:

1. A lath for a roller shutter comprising a flat longitudinal metallic base member having two major faces and terminating at each longitudinal edge in an end flange, a plurality of longitudinal ribs each having a head portion thereon extending from one major face of said base member, a mass of high density polyurethane foam having a density of between 10 and 30 pounds per cubic foot and a K value of not more than 0.4 molded onto said one major face of said base member, said mass having an external flat surface and inclined longitudinal stepped side portions terminating at the respective end flanges, said other major face of said base I member having thereon a layer of semi-flexible closed microcellular polyurethane elastomer having a K value of not more than 0.45.

2. A lath for a roller shutter comprising a box section having a front wall, a rear wall, upper and lower walls extending between said front and rear walls, said upper and lower walls each having an inclined face extending from the front to the rear of the lath, and an intermedihaving a layer of semi-flexible closed microcellular ate rib extending from the front wall and connected to the rear wall, the interior of the box section being filled with low density polyurethane foam having a density of between 1.5 and 4 pounds per cubic foot, the rear wall 5 polyurethane elastomer having a K value of not more than 0.45 on the outer face thereof.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2907383 *Apr 23, 1956Oct 6, 1959Haskelite Mfg CorpPlastic rollaway door
US3234996 *Aug 26, 1963Feb 15, 1966Won Door CorpSound retarding folding partition
US3236007 *Jun 6, 1963Feb 22, 1966Abeson MarionDeformable figure toy of laminated sheet material
US3327447 *Apr 22, 1965Jun 27, 1967Traulsen & Co IncInterlocking joint for abutted edges of insulated panel sections
US3332170 *Jul 23, 1964Jul 25, 1967John R BangsStructural assembly for the prevention of thermal leakage
US3338013 *Feb 26, 1965Aug 29, 1967Polyfoam Prod IncVentilated panel construction
US3345245 *Sep 26, 1960Oct 3, 1967Stauffer Chemical CoComposite structure having shock absorbing properties
US3459611 *Jul 18, 1966Aug 5, 1969Holiday Inns Of America IncMethod of making a mattress from foamed plastic material
US3511007 *Mar 5, 1964May 12, 1970Babcock Henry NStructural systems employing foaming-in-place
US3511301 *Oct 26, 1967May 12, 1970Graham Door CoDoor sections having unitized hardware
US3525661 *Apr 19, 1966Aug 25, 1970Conch Int Methane LtdThermal insulation structures
US3557264 *Sep 21, 1967Jan 19, 1971Eaton Yale & TowneLoad supporting structures
US3591532 *Jun 6, 1968Jul 6, 1971Upjohn CoHigh density cellular polyurethane elastomer
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4073987 *Oct 7, 1975Feb 14, 1978Bauknecht Gesellschaft Mit Beschrankter Haftung Elektrotechnische FabrikenMulti-layer front plate for furniture and method of making same
US4174419 *Nov 8, 1978Nov 13, 1979Allied Chemical CorporationStabilized magnetic shields
US4276954 *Oct 1, 1979Jul 7, 1981Acoustic StandardsAdjustable light and air-admitting window thermal and acoustic barrier system
US4292763 *Dec 7, 1979Oct 6, 1981The United States Of America As Represented By The United States Department Of EnergyReflective insulating blinds for windows and the like
US4462778 *Feb 8, 1982Jul 31, 1984Mario CalcagniExtrusion head for extruding mouldings for roller blinds, frames, finish and the like
US4486996 *May 19, 1982Dec 11, 1984Luis AlejosConstruction-panel prefabrication method, panels thus made and equipment for implementing said method
US4628982 *Apr 10, 1984Dec 16, 1986Martinray Industries Ltd.Insulated closure panel
US4690411 *Dec 23, 1985Sep 1, 1987Winkle Denzal W VanBonded mechanically inner connected seal arrangement for a blowout preventer
US4718472 *Jan 13, 1987Jan 12, 1988Hormann Kg AmshausenSectional strip for roll-up, fold-up, and similar gates
US5435108 *Dec 7, 1993Jul 25, 1995Clopay Building Products CompanyInsulated garage door panel
US6006817 *Jan 9, 1998Dec 28, 1999Clopay Building Products CompanyOverhead door, panel and hinge assembly
US6659158Jun 19, 1998Dec 9, 2003Rite-Hite Holding CorporationQuick-action rolling shutter door
US6772814Jul 12, 2002Aug 10, 2004Clopay Building Products R&D Company, Inc.Combined weather seal, light block and wear insert for overhead door panel
US7111661 *Mar 27, 2002Sep 26, 2006Rite-Hite Holding CorporationQuick-action rolling shutter door
DE19726156A1 *Jun 20, 1997Dec 24, 1998Guido LangenbachSchnellaufrolltor
DE19726156C2 *Jun 20, 1997Aug 2, 2001Guido LangenbachSchnellaufrolltor
EP0990762A2 *Sep 23, 1999Apr 5, 2000Di Natale S.r.l.Shutter with adjustable lamellae and outer covering
Classifications
U.S. Classification428/81, 52/309.11, 52/309.7, 264/46.7, 428/319.1, 428/461, 160/236
International ClassificationF25D23/02, E06B3/48, E06B9/15, E06B9/17, B60J5/08
Cooperative ClassificationE06B9/15, F25D23/021, E06B2009/1522, E06B2009/1538, E06B2009/1566, E06B2009/1511, B60J5/08, E06B3/485
European ClassificationF25D23/02A, E06B9/15, B60J5/08, E06B3/48C